CN101108478A

CN101108478A - Chain tightening device

Info

Publication number: CN101108478A
Application number: CNA2007101392170A
Authority: CN
Inventors: 王跃平; 李彬
Original assignee: Individual
Current assignee: CHANGZHI YUANLU MINING EQUIPMENT CO LTD
Priority date: 2007-08-13
Filing date: 2007-08-13
Publication date: 2008-01-23
Anticipated expiration: 2027-08-13
Also published as: CN100562408C

Abstract

The invention discloses a chain tightener with high efficiency and strong load bearing capacity, which comprises hooks and a force-applying device. A gear rack is positioned in a gear rack sleeve, the hooks are respectively arranged on the gear rack and the gear rack sleeve; a sleeve pipe is arranged at the lower part of the gear rack sleeve, the upper part of the sleeve pipe is communicated vertically with the lower part of the gear rack sleeve; the force-applying device is positioned in the sleeve pipe, and the toothed shaft of the force-applying device is hinged with the gear rack. The force-applying device is composed of a rotating shaft and a non-return mechanism, one end of the rotating shaft is equipped with a rotating handle, and the middle is equipped with a fluted disc, the toothed shaft is arranged at the position corresponding to the gear rack; another end of the rotating shaft is a step shaft, a pin hole is arranged in the part of the step shaft passing out the bottom hole of the sleeve pipe, and a pin is arranged in the pin hole. The no-return mechanism is composed of a fluted disc and a flexible braking mechanism. The flexible braking structure is composed of a spring, a ratchet and a hinge shaft. The two ends of the spring are fixed on the casing of the gear rack sleeve and the ratchet respectively, one end of the ratchet is fixed on the casing of the gear rack sleeve, another end is suspended in the air and provided with a hinge shaft, a pushing tooth is arranged in the middle of the ratchet, and a foldable plate is hinged with the ratchet. The invention is for tightening the chain on a scraper conveyor.

Description

Chain tightener

Technical field

The present invention relates to a kind of chain tightener of mine flight conveyer.

Background technology

Drag conveyor is all used in present many collieries, often needs the chain link of lengthening or shortening drag conveyor, and traditional method is to rely on manually to carry out, and during manually-operated, fastens the labor chain in the headstock both sides, and the crawl motor makes its reversing, reaches the purpose of dismounting chain.But, cause equipment to decrease ring easily with the mode of crawl motor, and be dangerous operation, often occur chain link also strength cause the workman to point extruding, weight person's finger that breaks.Though this mode of operation is unallowed than very fast in the operational procedure in colliery, belongs to and operates against regulations.But it is very inconvenient to lead the chain dismounting by 5 tons of existing operational procedure uses.The patent No. is 200520073289.6 Chinese patent, discloses a kind of scraper plate transportation chain tightener, and this chain tightener has solved the safety problem that prior art exists basically, but its structure is also undesirable.This chain tightener mainly adopts connecting rod and hinge arrangement, and the lifting by screw mandrel drives the flexible of drag hook, thereby reaches the purpose of degree of tightness chain.This chain tightener will pass through the purpose that the repeatedly transmission of power could realize flexible drag hook, so efficient is lower.Simultaneously, because force application mechanism all adopts the structure of connecting rod and hinge, intensity is less, bears the scarce capacity of load.

Summary of the invention

The purpose of this invention is to provide a kind of tight chain efficient height, bear the strong chain tightener of load capacity.

The present invention is achieved in that and comprises drag hook, force application apparatus, and tooth bar is arranged in rack tube, and drag hook is contained in respectively on tooth bar and the rack tube, the rack tube bottom is provided with sleeve pipe, this sleeve pipe top and rack tube lower vertical are used to lead to, and force application apparatus is arranged in sleeve pipe, the tooth axle of force application apparatus and tooth bar engagement.

Described force application apparatus is formed by revolving axle and non-return mechanism, an end that revolves axle is equipped with swing handle, the middle part is provided with fluted disc, be provided with the tooth axle with the tooth bar correspondence position, the other end that revolves axle is a multidiameter, the multidiameter that passes sleeve pipe bottom outlet part is provided with pin-and-hole, in this pin-and-hole pin is housed, and described non-return mechanism is made up of fluted disc and resilient mechanism.

Described resilient mechanism is made up of spring, ratch and hinge, and both ends of the spring is separately fixed on rack tube shell and the ratch, and an end of ratch is fixed on the rack tube shell, and the other end is unsettled and hinge is housed, and its middle part is provided with apical tooth, and tabs and ratch are hinged.

The invention has the beneficial effects as follows: adopt rack tube, tooth bar and force application apparatus to make up, its compact conformation, the direct and tooth bar engagement of the tooth axle of force application apparatus has reduced the intermediate link that power is transmitted, high efficiency; The sectional dimension of main stressed member is relatively large, intensity is also higher, and the ability of carry load is stronger.If force application apparatus adopts decelerator to replace, can be more laborsaving.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is that the A of Fig. 1 is to cutaway view;

Fig. 3 is the tight chain working state figure of non-return mechanism;

Fig. 4 is a non-return mechanism pine chain working state figure.

The specific embodiment

Illustrated in figures 1 and 2, the present invention is made up of drag hook 3, force application apparatus, tooth bar 1, tooth axle, tooth axle sleeve and non-return mechanism.Tooth bar 1 is contained in the rack tube 2, and is slidingly matched with rack tube 2.Two drag hooks 3 are welded in respectively on tooth bar 1 and the rack tube 2, also can be fixed by bolts on tooth bar 1 and the rack tube 2.The rack tube 2 bottoms welding or the sleeve pipe 5 that is spirally connected, these sleeve pipe 5 tops and rack tube 2 lower vertical are used to lead to, and make force application apparatus be arranged in sleeve pipe 5, and with sleeve pipe 5 matched in clearance, the tooth axle of force application apparatus meshes by the through hole of being used to logical part and the tooth bar 1 that exposes.Force application apparatus is formed by revolving axle 4 and non-return mechanism.Revolve an axle end of 4 swing handle of burn-oning, there is fluted disc at the middle part, and this fluted disc can be fixed on by modes such as welding or interference fit and revolve on the axle 4.Revolve axle and be provided with the tooth axle with tooth bar 1 correspondence position on 4, this tooth axle with revolve axle 4 and be one, also can by welding or interference fit with revolve spools 4 and fix as one.The other end that revolves axle 4 is a multidiameter, and after the axle head of multidiameter passed the sleeve pipe bottom outlet, the pin of packing in the pin-and-hole on multidiameter prevented to revolve axle 4 and deviates from.Described non-return mechanism is made up of fluted disc and resilient mechanism.Fig. 3 and Fig. 4 show, described resilient mechanism is made up of spring 9, ratch and hinge 7, spring 9 two ends are separately fixed on rack tube 2 shells and the ratch, one end of ratch is fixed on rack tube 2 shells, the other end is unsettled and hinge 7 is housed, the middle part of ratch is welded with apical tooth 8, and tabs 6 is hinged by hinge 7 and ratch.During work, two side links are penetrated respectively in the drag hook 3, shake swing handle, revolve the tooth axle rotation of axle on 4, and drive tooth bar 1 and move along axis direction, two drag hook 3 move toward one another, thus chain is tightened up, carry out tight chain subsequently or tear the chain operation open.For guaranteeing the reliability of operation, prevent resilience, also be provided with non-return mechanism.Spring 9 tension ratch in this mechanism embed in the fluted disc dental groove apical tooth 8 that is connected as a single entity with ratch, when revolving axle 4 drive fluted disc counter-rotatings, because the effect of apical tooth 8 can not be reversed fluted disc.After operation is finished, when needing counter-rotating to unload chain, only need unsettled ratch is lifted, simultaneously tabs 6 is gone back to apical tooth 8 belows, encase apical tooth 8, apical tooth 8 can not be embedded in the roller seating space of fluted disc, time shake swing handle to make two drag hooks 3 from motion, reach the purpose of loose chain.At last, chain is taken out from drag hook 3.If the present invention replaces force application apparatus with decelerator, can be more laborsaving during operation.

Claims

1. chain tightener, comprise drag hook (3), force application apparatus, it is characterized in that: tooth bar (1) is arranged in rack tube (2), drag hook (3) is contained in respectively on tooth bar (1) and the rack tube (2), rack tube (2) bottom is provided with sleeve pipe (5), this sleeve pipe (5) top and rack tube (2) lower vertical are used to lead to, and force application apparatus is arranged in sleeve pipe (5), the tooth axle of force application apparatus and tooth bar (1) engagement.

2. chain tightener according to claim 1, it is characterized in that: described force application apparatus is formed by revolving axle (4) and non-return mechanism, an end that revolves axle (4) is equipped with swing handle, the middle part is provided with fluted disc, be provided with the tooth axle with tooth bar (1) correspondence position, the other end that revolves axle (4) is a multidiameter, and the multidiameter that passes sleeve pipe bottom outlet part is provided with pin-and-hole, in this pin-and-hole pin is housed, described non-return mechanism is made up of fluted disc and resilient mechanism.

3. chain tightener according to claim 2, it is characterized in that: described resilient mechanism is made up of spring (9), ratch and hinge (7), spring (9) two ends are separately fixed on rack tube (2) shell and the ratch, one end of ratch is fixed on rack tube (2) shell, the other end is unsettled and hinge (7) is housed, its middle part is provided with apical tooth (8), and tabs (6) is hinged with ratch.